'Unloose' in the Bible

And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose.

John answered, saying unto them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire:

He it is, who coming after me is preferred before me, whose shoe's latchet I am not worthy to unloose.

And as John was fulfilling his course, he said, What suppose ye that I am? I am not he . But behold, there cometh one after me the shoes of whose feet I am not worthy to unloose.